Yarn severing device on a spinning machine stop motion



JU1Y111'969- v j '.Lwwrrson' 3,452,531

" YARN SEVERING DEVICE ou A SPINNING MACHINE s'roP nono-1 rild Aug. 20,1968

INVENT OR United States Patent O 3,452,531 YARN SEVERING DEVICE ON A SPINNING MACHINE STOP MOTION John W. Watson, Greenwood, S.C., assigner of fifty percent to Paul H. Kennemore, Greenwood, S.C. Filed Aug. 20, 1968, Ser. No. 754,011 Int. Cl. D01h 13/18; D01g 31/00 U.S. Cl. 57-86 5 Claims ABSTRACT F THE DISCLOSURE This invention relates to an apparatus for use with a winding machine which severs a strand at one point responsive to the strand breaking at another point.

It has been found that in strand winding apparatus, such as spinning frames `and the like, it is desirable to stop feeding the strand into the drafting system when the strand breaks between the drafting system and a take-up means. If the strand feeding is allowed to continue, then the strand begins to lap-up or accumulate on the drafting rolls. Moreover, by allowing the feeding of the strand to continue after the taking up operation ceases such enhances the possibility of breaking adjacent strands on the winding mechanism.

If the lap-up or accumulations of strands are permitted to build up on a roller of the drafting system, such will eventually cause the roller to tilt. This, in turn, causes the top roller of the drafting system to bounce and produce an uneven winding on the take-up device, which when being used on a spinning frame is the bobbin. Moreover, by maintaining the rollers clean such minimizes the slubs which would be produced in the strand if it were permitted to be fed over a roller having an accumulation of strands thereon. This, in turn, improves the production in the weave room since the fabric finally woven from the yarn has fewer imperfections therein. Moreover, the accumulation or lap-up can in some particular instances cause damage to the apron or may warp the steel rollers within the `drafting system.

While the particular apparatus being described is shown mounted on a spinning frame and the operation of such is explained in that environment, it is to be understood that it is within the scope of the subject invention that such can be used in other types of winding machines.

Many attempts have been made to produce a yarn stop motion device but for one reason or another they have not completely solved the problem. For example, Patent No. 1,783,897 granted Dec. 2, 1930, to Aveyard, illustrates a yarn stop motion device which relies on a counterweight for breaking and clamping a second strand of yarn when a rfirst strand is broken.

Accordingly, it is an important object of the present invention to provide an apparatus for severing a strand at one point responsive to breaking of the strand at another point.

Another important object of the present invention is to provide an apparatus which can be used on a winding machine for yautomatically stopping the feeding of a strand into a drafting apparatus responsible to breaking of the strand being fed onto a take-up means.

Another important object of the present device is to provide a strand severing Aapparatus which minimizes lap-up and accumulations in a drafting system mounted on a winding machine.

Still another important object of the present invention is to provide an apparatus which minimizes accumulations of strands and the like, in the drafting system, therefore, improving the quality of the yarn being produced.

The construction designed to carry out the invention will be hereinafter described, together with other features thereof.

The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings forming a part thereof, wherein an example of the invention is shown and where- 1n:

FIGURE 1 is a side elevational view illustrating a portion of a spinning frame with an apparatus mounted above the drafting system for severing the roving being fed therein responsive to breaking of the yarn below the drafting system,

FIGURE 2 is an enlarged side elevational view showing the drafting system and the apparatus for breaking the roving mounted adjacent thereto,

FIGURE 3 is a top view illustrating the strand severing apparatus, the traverse bar, and a guide means or trumpet provided for feeding the roving into the drafting assembly, and

FIGURE 4 is -a rear elevational view illustrating a portion of the strand 4severing apparatus and in particular, the roving passing through a slidable member forming a part of the apparatus.

The drawing illustrates a strand winding apparatus, such as a spinning frame, having a ldrafting system for drawing textile strands from packages of roving. The take-up means, such as bobbins, are provided for receiving said strand from the :drafting system. A guide means or trumpet A is carried adjacent the drafting system for guiding the strand into the drafting system. Means, such as the traverse bar, reciprocally moves the trumpet A laterally relative to the drafting system. An apparatus is carried adjacent the trumpet A for severing the roving being fed into the drafting system responsive to the yarn breaking below the drafting system. The apparatus includes a fixed member B and la slidable member C which is carried in juxtaposition with the fixed member B. The strand is fed through the trumpet A adjacent the slidable member C and the Ifixed member B. A pivotal means D is carried by the slidable member C and engages the strand between the `drafting system and the take-up means. The portion of the strand above the drafting assembly is referred to as roving while the strand leaving the drafting assembly being wound on the bobbin is referred to as yarn. When the yarn breaks the pivotal means D shifts from a rst position to a second position. When the pivotal means D is in the second position the trumpet engages such, shifting the slidable member C laterally relative to the fixed member severing the strand therebetween. Thus, as the strand breaks below the drafting system such is severed above the drafting system so as to minimize lap-ups thereon.

The present strand severing apparatus may be used in association with many different types of winding machines having instrumentalities for winding or processing strands and, in its preferred embodiment, the novel apparatus is illustrated in association with a spinning machine, for example.

The spinning machine comprises a frame 10 upon which packages of roving 11 are carried on a creel 12 so that the strand or roving can be fed into a conventional drafting assembly, generally designated at 13. The strand or yarn 14 is then passed downwardly and is wound upon means for receiving the strand, such as a bobbin 15. The bobbins are carried on conventional spindles 16 which are suitably supported by a spindle rail 17 carried by the frame 10. The spindles 16 are driven by tape members 18 which are, in turn, driven by a centrally disposed driven drum 19 extending longitudinally of and within the lower portion of the frame 10.

As the roving 20 is fed from the packages 11 it passes through the trumpet A which is supported on a conventional traverse bar 21. The traverse -bar 21 reciprocally moves the trumpet A laterally relative to the drafting assembly 13 so that the roving does not pass over the same spot on the drafting rolls at all times. The distance that the traversing bar reciprocates is adjustable and normally such is between Mr and`% of an inch.

The drafting assembly includes three top rolls 22 and three corresponding lower rolls 23. The lower rolls are suitably supported on the conventional roll stand 24 which is, in turn, mounted by any suitable means, such as bolts, on the roller beam 25. The top rolls 22 are rotatably carried within the conventional cap bar arm (not shown) which is pivotally mounted on a cap bar rod 26. The parts of the spinning frame heretofore described are conventional and are described only for environmental purposes.

As previously mentioned, when the yarn breaks between the drafting assembly 13 and the bobbin 15 the roving will tend to lap-up on the top rolls of the drafting assembly since such continues to pull the roving from the package. These strands will frequently accumulate to such a degree that the aprons (not shown) will break. Furthermore, when the strand is tied back in, slubs will be produced in the yarn due to such passing over the accumulated strands on the top rolls 22. Thus, as can be seen, it is desirable that when the yarn breaks the drafting mechanism 13 should cease drawing the roving from its packages.

The apparatus constructed in accordance with the present invention breaks the roving 11 responsive to the yarn 14 breaking between the drafting assembly 13 and the bobbin 15. Such is accomplished by allowing the roving 11 to pass adjacent a xed cylindrical member B, which is in turn, mounted on top of an inverted cradle shaped clamp 27, which is in turn, supported and ixed to the cap bar rod 26 -by means of setscrews 28.

A slidable member C in the form of an elongated slug is carried within the cylindrical fixed member B and is capable of being shifted laterally relative thereto. The slidable member C has a vertically extending member 29 integral therewith, which extends through an elongated slot 30 in the upper portion of said fixed cylindrical member B. It is noted from referring to FIGURE 3 that the elongated slot 30 terminates short of the left-hand end of the fixed member B so as to restrict the movement of the slidable member C in that direction. The slidable member C has unrestricted movement to the right so that such can be removed completely from the iixed cylindrical member B, if desired.

The slidable member C has an opening or slot 31 which extends therethrough perpendicular to its longitudinal axis for permitting the roving 11 to pass therethrough into the trumpet A. It is, also, noted that an arcuate shaped eye 32 is attached to the fixed member B adjacent the left-hand end for guiding the roving 11 into slot 31.

A counterbalanced pivotal means D is hingedly attached to the vertical member 29 and rests on yarn below the drafting system when such is operating properly. However, when the yarn 14 breaks the pivotal means D pivots downwardly from the full line position, illustrated in FIG- URE 2, to the dotted line position. It is noted that when such is in the dotted line position one end of an outwardly extending member 33 is shifted into the path of the recinrocating trumpet A. When the trumpet moves to the right it engages the outwardly extending member 33 causing such to be shifted a corresponding distance to the right. This, in turn, causes the slidable sleeve member C to be shifted to the right pinching the roving 11 passing through the slot 31 between the fixed member B and a solid portion 34 of the slidable member C which is on the opposite side of the opening 31 from the fixed member B. Since the drafting system is still pulling on the roving 11, such causes the roving to be severed between the drafting system and the pinched portion adjacent the slidable member C. If the drafting system were allowed to continue to draw the roving from the packages, such would lap-up on the rolls 22 interfering with the spinning operation, and as previously mentioned, damaging certain components eventually, such as the rolls, the aprons, and the quality of the yarn.

The pivotal means D, in addition to including the outwardly extending member 33, includes a lead counterweight 35 which is attached to the inner end of the outwardly extending member 33 by any suitable means, such as screws. The outwardly extending member 33 is, in turn, hingedly connected to the vertical member 29.

An arm 36 constructed of wire extends outwardly and over the drafting system terminating in a horizontal portion 37 which rests on the yarn 14 during the spinning operation. A setscrew 38 extends into the counterweight 35 to engage a bent portion 39 so that the position of the arm can be adjusted and set to produce the desired pressure exerted on the yarn 14. It is desirable that the pressure exerted by the horizontal portion 37 of the arm 36 be as little as possible, yet it should be sufficient enough that when the yarn breaks the pivotal means D drops positively to the dotted line position, such as illustrated in FIGURE 2.

It is noted that a lateral extension 40 is carried on the outer end of the outwardly extending member 33 so that the trumpet when reciprocating will not be allowed to move to the right of the outwardly extending member 33. If the pivotal means D drops when the trumpet has been shifted to the right, then the outwardly extending member 33 will ride on top of the trumpet A until such shifts to the left at which time it then drops down alongside of the trumpet A so that the trumpet will shift it to the right as it moves to the right.

What is claimed is:

1. In combination with a strand winding apparatus having a drafting system for drawing textile strands such as roving and the like from packages, take-up means for receiving said strand from said drafting system, a trumpet carried adjacent said drafting system for guiding said strand into said drafting system, and means reciprocally moving said trumpet laterally relative to said drafting system, the improvement comprising: an apparatus carried adjacent said trumpet, said apparatus including a fixed member, a slidable member carried in juxtaposition with said fixed member, said strand passing adjacent said slidable member and said fixed member, a pivotal means carried by said slidable member engaging said strand between said drafting system and said take-up means shifting from a first position to a second position responsive to breaking of said strand, said trumpet engaging said pivotal means when in said second position shifting said slidable member laterally relative to said fixed member severing said strand therebetween, whereby when said strand breaks below said drafting system such is severed above said drafting system so as to minimize lap-up thereon.

2. The combination as set forth in claim 1, wherein said slidable member has an opening therein through which the strand is fed during said winding operation and a solid portion on an opposite side of said opening from said ixed member, whereby when said slidable member is shifted responsive to breaking of a strand said solid portion binds said strand against said fixed member thereby severing such.

3. The combination as set forth in claim 1, wherein said pivotal means is counterbalanced for minimizing the pressure exerted on said strand during said winding operation.

4. The combination as set forth in claim 3, wherein said pivotal member is hingedly connected to said slidable member.

5. In combination with a strand Winding apparatus having means for receiving a strand, a guide means for guiding said strand, and means reciprocally moving said guide means, the improvement comprising: an apparatus carried adjacent said guide means; said apparatus including a fixed member, a slidable member carried in juxtaposition with said xed member, said strand passing adjacent said slidable member and said fixed member, a pivotal means carried by said slidable member engaging said strand shifting from a irst position to a second position responsive to breaking of said strand, said guide means engaging said pivotal means when in said second position shifting said slidable member laterally relative to said xed member severing said strand therebetween, whereby when said strand breaks such is severed to avoid accumulation which would result if strand feeding continued.

References Cited UNITED STATES PATENTS 1,442,872 1/ 1923 Garey. 1,442,873 1/ 1923 Garey. 1,458,980 6/ 1923 Kapatas. 1,509,234 9/ 1924 Garey.

JOHN PETRAKES, Primary Examiner.

U.S. Cl. X.R. 

